EP1685889B1 - Oil sump filter - Google Patents
Oil sump filter Download PDFInfo
- Publication number
- EP1685889B1 EP1685889B1 EP05109531A EP05109531A EP1685889B1 EP 1685889 B1 EP1685889 B1 EP 1685889B1 EP 05109531 A EP05109531 A EP 05109531A EP 05109531 A EP05109531 A EP 05109531A EP 1685889 B1 EP1685889 B1 EP 1685889B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- filter
- oil
- housing
- frame
- contours
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007789 sealing Methods 0.000 claims abstract description 31
- 238000009434 installation Methods 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000011045 prefiltration Methods 0.000 claims description 9
- 239000003365 glass fiber Substances 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 77
- 238000001914 filtration Methods 0.000 description 6
- 239000011362 coarse particle Substances 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 4
- 239000000806 elastomer Substances 0.000 description 4
- 239000010687 lubricating oil Substances 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 101100289200 Caenorhabditis elegans lite-1 gene Proteins 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 241000237983 Trochidae Species 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000004941 influx Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
- B01D35/027—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks rigidly mounted in or on tanks or reservoirs
- B01D35/0273—Filtering elements with a horizontal or inclined rotation or symmetry axis submerged in tanks or reservoirs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/0004—Oilsumps
- F01M2011/0029—Oilsumps with oil filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0402—Cleaning of lubricants, e.g. filters or magnets
- F16H57/0404—Lubricant filters
Definitions
- the invention relates to an oil filter unit in an oil collecting space such.
- B. an oil pan or a housing is arranged.
- Such oil filter units are used for example for cleaning the lubricating oil of gears e.g. Automatic transmissions used.
- the filter unit In order to adapt the filter unit to the installation space, it is shaped like a tub and can be positioned directly in the oil sump. The task is to separate impurities from the lubricating oil and thus to extend the service life of the lubricating oil and to minimize the wear of the unit to be lubricated.
- the oil filter unit with the greatest possible filtration fineness and minimal flow resistance should have a sufficient dirt capacity and be designed for example in motor vehicles with automatic transmissions for the entire vehicle life.
- a lubricating oil filter comprising a first and a second housing shell, wherein a clamped between the shells filter element is provided.
- a metal oil pan for engines or transmissions wherein an oil filter medium is disposed between the oil pan bottom and a plastic shell.
- a liquid filter with a housing which comprises an upper and a lower housing shell and a flat filter element arranged between them.
- an oil filter unit which has a filter chamber in a trough-shaped housing, which corresponds to an oil inlet and an oil outlet.
- a ribbed, replaceable filter element is arranged within the filter chamber.
- the hollow filter element is arranged substantially parallel to the space to the filter chamber and is flowed through from outside to inside.
- a disadvantage of this design is that the replaceable filter element has to be sealed at its opposite end faces due to the exchangeability consuming relative to the housing. To this seal corresponding contours are required on the filter element and the housing, which allow a detachable and sealed connection. The production of these contours places high demands on the production process. Furthermore, the size of the filter surface is directly dependent on the circumference of the filter chamber, this means a strong limitation in the vote of dirt capacity and filtration fineness. Due to this limitation, the described oil filter unit no filter medium can be integrated, which ensures a necessary for the operation of automatic transmissions filter fineness. Use of such a filter medium would exceed the differential pressure required in the suction mode. To meet this requirement, in practice, a coarse particle filter is used on the suction side and an additional fine particle filter is connected downstream of the pressure side.
- the object of the invention is to provide a single oil filter unit, which at a high filtration fineness has a large dirt capacity and thereby allows a long service life, or can be designed for the life of a vehicle transmission. Furthermore, the oil filter unit should have a low pressure loss, be simple and economical to produce and have a secure seal of the filter element relative to the housing.
- the oil filter unit according to the invention aims to use a filter medium which makes maximum use of the space within a filter chamber and forms the largest possible filter surface. This is achieved by using a zig-zag folded filter medium. Due to a flat, trough-shaped installation space, a flat-shaped folded filter medium is preferably used.
- the filter medium is enclosed by a frame, which has sealing contours, with the housing or with sealing contours of the housing correspond.
- the frame can for example be made of plastic such as polyamide or polypropylene and injection-molded directly to the filter medium.
- the molded sealing contour can be, for example, a web which corresponds to grooves formed in the housing.
- connection between the filter medium and the frame can be made for example by gluing, joining or welding and in particular by vibration welding.
- the frame or the sealing contour can also be formed from PU foam or another known from the prior art elastomer.
- a flat filter element formed in this way is introduced into the housing in the longitudinal direction and subdivides it into an underlying raw side and an upper clean side. On the raw side of the housing, at least one oil inlet is arranged through which the oil flows from the oil sump into the housing. On the clean side of the housing, an oil outlet is arranged through which the filtered oil flows. The outflow is preferably carried out via a discharge nozzle which is made in one piece with the housing.
- the filter medium is formed of glass fibers.
- glass fiber media high demands on the filter fineness can be realized. Due to the high melting point of the media, an encapsulation of the filter frame is easily possible.
- the oil filter unit is advantageously simple and economical to produce and achieves a high effective filtration performance.
- glass fiber media are used which have a filter fineness of less than 25 ⁇ m pore size.
- the filtration fineness achieved thereby makes it possible to further increase the filtration performance without an additional filter unit.
- the filter medium is stabilized with respect to the flow pressure by attaching a support grid on the inlet and / or outflow side.
- This support grid is located directly on the inlet and / or outflow side of the filter medium and runs parallel to the zigzag-shaped fold.
- the support grid has the task of mechanically stabilizing the filter medium against the inflow pressure of the oil and to prevent flooding possible fiber parts from the medium.
- the support grid can stabilize the Faltgeometrie the filter medium or form the Faltgeometrie itself.
- the material used for the support grid is preferably metal, but it is also possible to use a temperature-resistant plastic or a stable spunbonded fabric. On the side surfaces of the medium, the mesh may be injected into the frame, whereby a secure attachment is ensured.
- the filter medium By supporting grid, the filter medium is stabilized mechanically reliable in a simple manner whereby the medium itself requires low stability, designed low and can be economically manufactured.
- the introduction of the filter element in the housing can be done by an attached at one end mounting hole.
- a closure lid can be arranged on the frame which closes the installation opening.
- the attachment can be detachable, e.g. be performed by snap-in connections or non-detachable by welding or gluing.
- additional sealing elements such as elastomers can be attached to the corresponding sealing contours between the closure cap and the housing and / or between the frame and the housing.
- the advantage of the invention results from the significantly increased dirt capacity with reduced differential pressure of the filter medium and the same installation space. As a result, there is enough dirt capacity available for coarse and fine particles available and it can be dispensed with an additional oil filter.
- the arrangement of a fixedly connected to the filter medium frame ensures a simple and economical to produce, sealing connection between the filter element and the housing. Due to the large filter surface results in a low pressure drop, so that the filter can be arranged on the suction side and can be dispensed with a pressure-side fine filter.
- the housing is formed of two shells, wherein between a top shell and a bottom shell, a parting plane extends in the longitudinal direction of the filter housing.
- the parting plane preferably divides the housing into a planar shape and completely encloses the filter medium.
- On top and bottom shell thus mirror-like separation surfaces are available.
- the sealing contours of the frame correspond to the parting surfaces and are sealed by them.
- the sealing contours of the frame can thus be arranged in the parting plane.
- the housing walls can be reinforced or widened at the separating surfaces.
- the separating surfaces can be stretched for example by screws or clip connections against each other and thereby produce a clamping force with the sealing contours of the element.
- the sealing contour may be sandwiched over the entire area of the parting surface, or integrated in a stepped sealing profile formed by the parting surfaces.
- the parting line is located at the largest peripheral portion of the housing, which can be produced undercut the two housing shells in an advantageous manner. Thereby All components are simple and economical to produce, in addition, results in a reliable and reliable installation.
- connection of the sealing contour of the frame is carried out in one embodiment as a permanent connection.
- the sealing contours of the frame can be glued or welded to the parting surfaces of the shells, for example. These types of connections allow to dispense with additional hardware and the space required for it. Taking into account the vibration and temperature stress of the connection, this embodiment represents a very cost-effective and reliable connection.
- a bypass valve is provided between the raw side and the clean side.
- Valves of this type usually consist of valve body, valve seat, spring and a basket.
- the preferably spring-loaded valve opens a flow cross section between the raw side and the clean side from a defined pressure difference of, for example, 0.4 bar. This situation can occur if the oil to be filtered is still very viscous due to low temperatures or if the filter medium has an increased flow resistance due to particles being flowed through.
- the installation space of the bypass valve can preferably be arranged in the parting plane. The parting plane is extended beyond an area of the filter medium, forming a valve space.
- bypass valve ensures a communicating connection in the flow direction.
- the bypass valve can be used as a separate unit in the frame. However, it is also possible to integrate a valve seat in the frame and add the other valve parts prior to assembly.
- the bypass valve secures the oil supply advantageously even with increased flow resistance of the filter element. Due to the arrangement in the parting plane, the bypass valve can be easily and economically integrated into the oil filter unit with minimal space requirements.
- a further advantageous embodiment is equipped with a backstop.
- Backstops of this type are preferably formed from a thin-walled metal plastic or elastomer plate, which radially or axially close a valve seat in a flow direction. In order to retain as much oil as possible in the oil filter unit, the backstop can be placed directly on the oil inlet.
- the backstop is advantageous even after a shutdown a fast oil supply to the oil filter unit safe and can be integrated in a small footprint in the lower shell, upper shell or in the frame.
- a prefilter directly at the oil inlet which retains coarse contaminants from the oil filter unit.
- This is preferably formed from a single-layer mesh which has a mesh size of about 0.4 mm to 0.8 mm.
- the oil inlet can be positioned directly next to the valve space of the bypass valve.
- the pre-filter can also be arranged to protect the bypass valve on this and thereby prevent a completely unfiltered influx of particles into the oil circuit when opening the bypass valve.
- the prefilter can be glued, clipped, screwed, welded or injected as an insert or be injected with it.
- the frame extends over a predetermined distance between the upper and the lower shell of the oil filter unit and thus forms part of the housing wall of the filter housing.
- the frame may also protrude above the height of the filter medium. This results in the, the shells facing sides of the frame a flexible space that can be used to arrange fastening contours.
- These contours can be used to mount the oil filter unit in a mounting structure or to attach the upper and the lower shell to the frame.
- contours for a vibration welding or a mirror weld on the frame.
- the space required for vibration welding can also be taken into account.
- the height of the frame also other functional parts such as the bypass valve, a backstop, or a pre-filter can be integrated into the frame or made in one piece with the frame.
- the frame can be made according to requirements as a 2-component component with different materials.
- this frame allows to integrate essential functional elements and to produce the connection between the shells reliably and economically.
- contours for fastening the oil filter unit in an installation space of a transmission are provided on the filter housing.
- These contours may have as flat webs, eye-shaped bulges, pins or clip-like hooks, as well as other known from the prior art attachment forms.
- the fastening contours can be arranged on the lower shell, on the upper shell or on the parting plane. Since the wall thickness is expediently reinforced in the region of the parting plane and can also be reinforced by the sealing contour of the filter element, this area is particularly suitable for the arrangement of fastening contours. These preferably correspond with fastening elements of the transmission housing and secure the position of the oil filter unit.
- the attachment of the oil filter unit can be optimally tuned with the installation space and the installation process, which allows a particularly favorable and economical attachment and assembly.
- contours are arranged on the oil outlet for connection to a suction flange of an oil pump.
- the filtered oil preferably flows via a ⁇ labströmstutzen, which is arranged on the upper shell further to an oil pump.
- contours are attached to the oil outlet. These may e.g. be executed as an annular collar, annular groove, as a latching contour or as any known from the prior art fastening contour for pipe socket.
- FIGS. 1a to 1c show an oil filter unit 10 in an exploded view, wherein the individual components are arranged in the mounting direction. It is between an in FIG. 1a shown upper shell 11 and a in Figure 1c shown lower shell 12 a filter element 13 in FIG. 1b shown. A Zmgehunsventil 30 and a pre-filter 31 are in the assembled state ( FIG. 2 ) is connected to the lower shell 12.
- the upper shell 11 forms a housing half of the two-part housing and has on the upper side a tubular ⁇ labströmstutzen 14, on which, on its downstream end face, a radial groove 15 for receiving an O-ring 16 is arranged.
- ribs 17 are integrally formed on the lower, the filter element 13 side facing, which stiffen the upper shell 11 and in a sixteen rejoinem, in the FIG. 2 illustrated state, a support of the filter element 13 form.
- the lower, shell-shaped opening of the upper shell 11 is enclosed in the entire circumference of the plane-shaped parting surface 18.
- a support wall 19 is arranged, which separates a first clean side 20 from a second clean side 21.
- the filter element 13 consists of a flat-shaped filter medium 23 which is enclosed on its side surfaces by a frame 24.
- the filter medium 23 is folded in a zig-zag, wherein the front edges of the folds are completely covered by the frame 24.
- the longitudinal sides of the folds are also sealingly secured to the frame 24, whereby the filter medium 23 is sealed over the entire circumference in the frame 24.
- the frame 24 has a web-shaped sealing contour 25 over its entire circumference.
- the lower shell 12 has a mirror-image separating surface 18b, facing the separation surface 18 of the upper shell.
- the lower shell 12 forms a raw space 28, which is separated by a transverse partition 26 of a valve chamber 27.
- a cylindrical valve flange 33 is arranged to receive the Bypass valves 30 is provided.
- the integrally formed on the bottom oil inlet 29 forms an oval contour which is arranged in the region of the partition wall 26 and thereby corresponds to the raw space 28 and the valve chamber 27.
- the pre-filter 31 shown below the oil inlet 29 corresponds by its peripheral contour with the oil inlet 29 and holds in the installed state coarse particles back.
- Fixing contours 22 arranged laterally on the upper shell 11 serve for fastening the oil filter element 10 in an installation space.
- FIG. 2a and 2b show the assembled oil filter unit 10, on which the filter element 13 between upper shell 11 and lower shell 12 is sealingly enclosed.
- the FIG. 2a shows the section x the FIG. 2 and the FIG. 2b shows the section y the FIG. 2 ,
- the sealing contours 25 of the frame 24 are inserted between the parting surfaces 18, 18b, these have corresponding to the sealing contours 25 sealing heels 32.
- a partition 26 is arranged, which separates the blanks 28 via the sealing contour 25 of the filter element 13 from the second clean side 21.
- the end face of the partition wall 26 is in a plane with the parting surfaces 18, 18b.
- connection between the parting surfaces 18, 18b and between the shoulders 32 and the sealing contour 25 may, for example, be glued or welded.
- the sealing contour 25 may be formed, for example, over the entire area of the separating surfaces 18, 18b, so that the shoulders 32 can be dispensed with and the sealing contour 25 is sandwiched between plane-shaped separating surfaces 18, 18b.
- a separated from the filter element 13 valve chamber 27, in which the bypass valve 30 is arranged is arranged.
- the bypass valve 30 is sealingly enclosed in the valve chamber 27 and corresponds on the lower side with the oil inlet 29 and on the upper side with the second clean side 21 between the first clean side 20 and second clean side 21 is a flow-permeable support wall 19 which the sealing contour 25 only supports and allows a flow (see FIG. 1 ).
- the ⁇ -ring 16 is inserted into the radial groove 15.
- the oil sucked through the oil inlet 29 is cleaned by the coarse particle prefilter 31 mounted in the lower shell 12.
- the oil flows through the filter medium 23, whereby it bulges in the flow direction and is supported by the ribs 17.
- the filter medium 23 heavily contaminated or the oil due low temperatures too thick, so opens due to the increased Differenzdrukkes the bypass valve 30 whereby the oil supply is secured.
- FIGS. 3a to 3c the oil filter unit 10 is shown with a much higher frame 124 in an exploded view, which projects beyond the filter medium 123.
- the upper shell 111 is in FIG. 1a , the lower shell in Figure 1c and the intermediate filter element 113 in FIG FIG. 1b shown.
- a valve flange 133 is formed, which serves to receive the bypass valve 130.
- the upper shell 111 and the lower shell 112 have a substantially planiform shape and have the separating surfaces 118, which correspond to the sealing surfaces 125 of the frame.
- the fastening contours 122 are made in one piece with the frame 124 and allow a central attachment in a mounting structure, not shown.
- FIGS. 4a and 4b show an embodiment of the lower shell 212 at which a reflux of the oil is prevented.
- a section of the region of the oil inlet 29 is shown as a full section through the lower shell 212.
- the return check valve 234 is buttoned into the lower shell 212 as a umbrella-shaped valve.
- a temparatur and chemically resistant elastomer such as silicone to choose from.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- General Details Of Gearings (AREA)
- Filtering Materials (AREA)
- Filtration Of Liquid (AREA)
Abstract
Description
Die Erfindung betrifft eine Ölfiltereinheit, die in einem Ölsammelraum wie z. B. einer Ölwanne oder einem Gehäuse angeordnet ist. Derartige Ölfiltereinheiten werden beispielsweise zur Reinigung des Schmieröles von Getrieben z.B. Automatikgetrieben verwendet. Um die Filtereinheit an den Einbauraum anzupassen wird diese wannenförmig gestaltet und kann direkt im Ölsumpf positioniert werden. Aufgabe ist es Verunreinigungen aus dem Schmieröl abzusondern und somit die Standzeit des Schmieröles zu verlängern und den Verschleiß des zu schmierenden Aggregates zu minimieren. Dabei soll die Ölfiltereinheit bei größtmöglicher Filterfeinheit und minimalem Strömungswiderstand eine ausreichende Schmutzkapazität aufweisen und beispielsweise in Kraftfahrzeugen mit Automatikgetrieben für die gesamte Fahrzeuglebensdauer konzipiert sein.The invention relates to an oil filter unit in an oil collecting space such. B. an oil pan or a housing is arranged. Such oil filter units are used for example for cleaning the lubricating oil of gears e.g. Automatic transmissions used. In order to adapt the filter unit to the installation space, it is shaped like a tub and can be positioned directly in the oil sump. The task is to separate impurities from the lubricating oil and thus to extend the service life of the lubricating oil and to minimize the wear of the unit to be lubricated. In this case, the oil filter unit with the greatest possible filtration fineness and minimal flow resistance should have a sufficient dirt capacity and be designed for example in motor vehicles with automatic transmissions for the entire vehicle life.
Aus der
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Nachteilig an dieser Gestaltung ist, dass das austauschbare Filterelement an seinen gegenüberliegenden Stirnseiten aufgrund der Austauschbarkeit aufwendig gegenüber dem Gehäuse abgedichtet werden muss. Zu dieser Abdichtung sind am Filterelement und am Gehäuse korrespondierende Konturen erforderlich, die eine lösbare und dichte Verbindung erlauben. Die Herstellung dieser Konturen stellt hohe Anforderungen an den Fertigungsprozess. Weiterhin ist die Größe der Filteroberfläche direkt vom Umfang der Filterkammer abhängig, dies bedeutet eine starke Einschränkung hinsichtlich der Abstimmung von Schmutzkapazität und Filterfeinheit. Aufgrund dieser Einschränkung kann die beschriebene Ölfiltereinheit kein Filtermedium integriert werden, welches eine für den Betrieb von Automatikgetrieben notwendige Filterfeinheit gewährleistet. Ein Einsatz eines solchen Filtermediums würde den im Saugbetrieb geforderten Differenzdruck übersteigen. Um diese Anforderung zu erfüllen, wird in der Praxis saugseitig ein Grobpartikelfilter verwendet und druckseitig ein zusätzlicher Feinpartikelfilter nachgeschaltet.A disadvantage of this design is that the replaceable filter element has to be sealed at its opposite end faces due to the exchangeability consuming relative to the housing. To this seal corresponding contours are required on the filter element and the housing, which allow a detachable and sealed connection. The production of these contours places high demands on the production process. Furthermore, the size of the filter surface is directly dependent on the circumference of the filter chamber, this means a strong limitation in the vote of dirt capacity and filtration fineness. Due to this limitation, the described oil filter unit no filter medium can be integrated, which ensures a necessary for the operation of automatic transmissions filter fineness. Use of such a filter medium would exceed the differential pressure required in the suction mode. To meet this requirement, in practice, a coarse particle filter is used on the suction side and an additional fine particle filter is connected downstream of the pressure side.
Aufgabe der Erfindung ist es, eine einzige Ölfiltereinheit zu schaffen, welche bei einer hohen Filterfeinheit eine große Schmutzkapazität aufweist und dadurch eine lange Standzeit ermöglicht, beziehungsweise auf die Lebensdauer eines Fahrzeuggetriebes konzipiert werden kann. Weiterhin soll die Ölfiltereinheit einen geringen Druckverlust aufweisen, einfach und wirtschaftlich herstellbar sein und eine sichere Abdichtung des Filterelements gegenüber dem Gehäuse aufweisen.The object of the invention is to provide a single oil filter unit, which at a high filtration fineness has a large dirt capacity and thereby allows a long service life, or can be designed for the life of a vehicle transmission. Furthermore, the oil filter unit should have a low pressure loss, be simple and economical to produce and have a secure seal of the filter element relative to the housing.
Diese Aufgabe wird durch die Merkmale des Patentanspruches 1 gelöst.This object is solved by the features of claim 1.
Die erfindungsgemäße Ölfiltereinheit zielt darauf ab ein Filtermedium zu verwenden, das den Raum innerhalb einer Filterkammer maximal nutzt und eine größtmögliche Filteroberfläche bildet. Dies wird dadurch erreicht, dass ein zick-zack-förmig gefaltetes Filtermedium verwendet wird. Aufgrund eines flachen, wannenförmigen Einbauraumes wird vorzugsweise ein flachförmig gefaltetes Filtermedium eingesetzt. Zur Abdichtung des Filtermediums gegenüber einem Gehäuse wird das Filtermedium von einem Rahmen umschlossen, welcher Dichtkonturen aufweist, die mit dem Gehäuse oder mit Dichtkonturen des Gehäuses korrespondieren. Der Rahmen kann beispielsweise aus Kunststoff wie Polyamid oder Polypropylen gebildet werden und im Spritzgußverfahren direkt um das Filtermedium angespritzt werden. Die angespritzte Dichtkontur kann beispielsweise ein Steg sein, der mit im Gehäuse eingeformten Nuten korrespondiert. Die Verbindung zwischen Filtermedium und Rahmen kann beispielsweise durch Kleben, Fügen oder Schweißen und insbesondere durch Vibrationsschweißen hergestellt sein. Der Rahmen bzw. die Dichtkontur kann auch aus PU-Schaum oder einem sonstigem aus dem Stand der Technik bekanntem Elastomer gebildet werden. Ein so gebildetes Flachfilterelement ist in Längsrichtung in das Gehäuse eingebracht und unterteilt dieses in eine untenliegende Roh- und eine oben liegende Reinseite. An der Rohseite des Gehäuses ist wenigstens ein Öleinlass angeordnet durch die das Öl aus dem Ölsumpf in das Gehäuse einströmt. An der Reinseite des Gehäuses ist ein Ölauslass angeordnet durch die das gefilterte Öl abströmt. Die Abströmung erfolgt vorzugsweise über einen Abströmstutzen der einstückig mit dem Gehäuse hergestellt ist.The oil filter unit according to the invention aims to use a filter medium which makes maximum use of the space within a filter chamber and forms the largest possible filter surface. This is achieved by using a zig-zag folded filter medium. Due to a flat, trough-shaped installation space, a flat-shaped folded filter medium is preferably used. For sealing the filter medium with respect to a housing, the filter medium is enclosed by a frame, which has sealing contours, with the housing or with sealing contours of the housing correspond. The frame can for example be made of plastic such as polyamide or polypropylene and injection-molded directly to the filter medium. The molded sealing contour can be, for example, a web which corresponds to grooves formed in the housing. The connection between the filter medium and the frame can be made for example by gluing, joining or welding and in particular by vibration welding. The frame or the sealing contour can also be formed from PU foam or another known from the prior art elastomer. A flat filter element formed in this way is introduced into the housing in the longitudinal direction and subdivides it into an underlying raw side and an upper clean side. On the raw side of the housing, at least one oil inlet is arranged through which the oil flows from the oil sump into the housing. On the clean side of the housing, an oil outlet is arranged through which the filtered oil flows. The outflow is preferably carried out via a discharge nozzle which is made in one piece with the housing.
Gemäß der Erfindung ist das Filtermedium aus Glasfasern gebildet. Durch die Verwendung von Glasfasermedien können hohe Anforderungen an die Filterfeinheit realisiert werden. Durch den hohen Schmelzpunkt der Medien ist auch ein Umspritzen des Filterrahmens problemlos möglich. Dadurch ist die Ölfiltereinheit in vorteilhafter Weise einfach und wirtschaftlich herstellbar und erreicht eine hohe effektive Filtrationsleistung.According to the invention, the filter medium is formed of glass fibers. By using glass fiber media high demands on the filter fineness can be realized. Due to the high melting point of the media, an encapsulation of the filter frame is easily possible. As a result, the oil filter unit is advantageously simple and economical to produce and achieves a high effective filtration performance.
Erfindungsgemäß werden Glasfasermedien verwendet, welche eine Filterfeinheit von weniger als 25 µm Porengröße aufweisen. Die dadurch erzielte Filtrationsfeinheit erlaubt es die Filtrationsleistung ohne eine zusätzliche Filtereinheit weiter zu steigern.According to the invention, glass fiber media are used which have a filter fineness of less than 25 μm pore size. The filtration fineness achieved thereby makes it possible to further increase the filtration performance without an additional filter unit.
Weiter erfindungsgemäß wird das Filtermedium gegenüber dem Strömungsdruck stabilisiert, indem an der An- und/oder Abströmseite ein Stützgitter angebracht wird. Dieses Stützgitter liegt direkt an der An- und/oder Abströmseite des Filtermediums an und verläuft parallel zur zick-zack-förmigen Faltung. Das Stützgitter hat die Aufgabe das Filtermedium gegen den Anströmdruck des Öles mechanisch zu stabilisieren und ein ausschwemmen möglicher Faserteile aus dem Medium zu verhindern. Weiterhin kann das Stützgitter die Faltgeometrie des Filtermediums stabilisieren bzw. die Faltgeometrie selbst bilden. Als Material für das Stützgitter wird vorzugsweise Metall verwendet es kann aber auch ein temperaturfester Kunststoff oder ein stabiles Spinnvlies zum Einsatz kommen. An den Seitenflächen des Mediums kann das Gittergeflecht mit in den Rahmen eingespritzt sein, wodurch eine sichere Befestigung gewährleistet ist.Further according to the invention, the filter medium is stabilized with respect to the flow pressure by attaching a support grid on the inlet and / or outflow side. This support grid is located directly on the inlet and / or outflow side of the filter medium and runs parallel to the zigzag-shaped fold. The support grid has the task of mechanically stabilizing the filter medium against the inflow pressure of the oil and to prevent flooding possible fiber parts from the medium. Furthermore, the support grid can stabilize the Faltgeometrie the filter medium or form the Faltgeometrie itself. The material used for the support grid is preferably metal, but it is also possible to use a temperature-resistant plastic or a stable spunbonded fabric. On the side surfaces of the medium, the mesh may be injected into the frame, whereby a secure attachment is ensured.
Durch Stützgitter wird das Filtermedium auf einfache Weise mechanisch zuverlässig stabilisiert wodurch das Medium selbst eine geringe Stabilität benötigt, günstig konzipiert und wirtschaftlich hergestellt werden kann.Die Einbringung des Filterelementes in das Gehäuse kann durch eine an einer Stirnseite angebrachte Einbauöffnung erfolgen. In diesem Fall kann am Rahmen ein Verschlussdeckel angeordnet sein der die Einbauöffnung verschließt. Die Befestigung kann dabei lösbar, z.B. durch Rastverbindungen oder unlösbar durch verschweißen oder verkleben ausgeführt werden. Zur Unterstützung der Dichtfunktion können an den korrespondierenden Dichtkonturen zwischen Verschlussdeckel und Gehäuse und/oder auch zwischen Rahmen und Gehäuse zusätzlich Dichtelemente wie beispielsweise Elastomere angebracht werden.By supporting grid, the filter medium is stabilized mechanically reliable in a simple manner whereby the medium itself requires low stability, designed low and can be economically manufactured. The introduction of the filter element in the housing can be done by an attached at one end mounting hole. In this case, a closure lid can be arranged on the frame which closes the installation opening. The attachment can be detachable, e.g. be performed by snap-in connections or non-detachable by welding or gluing. To support the sealing function, additional sealing elements such as elastomers can be attached to the corresponding sealing contours between the closure cap and the housing and / or between the frame and the housing.
Der Vorteil der Erfindung ergibt sich durch die wesentlich vergrößerte Schmutzkapazität bei verringertem Differenzdruck des Filtermediums und gleichem Einbauraum. Dadurch steht genügend Schmutzkapazität für auftretende Grob- und Feinpartikel zur Verfügung und es kann auf einen zusätzlichen Ölfilter verzichtet werden. Die Anordnung eines mit dem Filtermedium fest verbundenen Rahmens, gewährleistet eine einfach und wirtschaftlich herstellbare, Dichtverbindung zwischen Filterelement und Gehäuse. Durch die große Filteroberfläche resultiert ein geringer Druckverlust, so dass der Filter saugseitig angeordnet werden kann und auf einen druckseitigen Feinfilter verzichtet werden kann.The advantage of the invention results from the significantly increased dirt capacity with reduced differential pressure of the filter medium and the same installation space. As a result, there is enough dirt capacity available for coarse and fine particles available and it can be dispensed with an additional oil filter. The arrangement of a fixedly connected to the filter medium frame, ensures a simple and economical to produce, sealing connection between the filter element and the housing. Due to the large filter surface results in a low pressure drop, so that the filter can be arranged on the suction side and can be dispensed with a pressure-side fine filter.
Gemäß einer weiteren vorteilhaften Ausgestaltung ist das Gehäuse aus zwei Schalen gebildet, wobei zwischen einer Oberschale und einer Unterschale eine Trennebene in Längsrichtung des Filtergehäuses verläuft. Die Trennebene durchtrennt das Gehäuse vorzugsweise planförmig und umschließt das Filtermedium vollständig. An Ober- und Unterschale sind somit spiegelgleiche Trennflächen vorhanden. Im zusammengebauten Zustand korrespondieren die Dichtkonturen des Rahmens mit den Trennflächen und sind durch diese dichtend verbunden. Die Dichtkonturen des Rahmens können somit in der Trennebene angeordnet werden. Um diese Verbindung zu stabilisieren können die Gehäusewandungen an den Trennflächen verstärkt oder wulstförmig aufgeweitet sein. Die Trennflächen können beispielsweise durch Schrauben oder Clipverbindungen gegeneinander gespannt sein und dadurch eine Spannkraft mit den Dichtkonturen des Elementes herstellen. Die Dichtkontur kann sich sandwichartig über den gesamten Bereich der Trennfläche ausdehnen, oder in einem abgestuften Dichtprofil welches von den Trennflächen gebildet wird integriert sein.According to a further advantageous embodiment, the housing is formed of two shells, wherein between a top shell and a bottom shell, a parting plane extends in the longitudinal direction of the filter housing. The parting plane preferably divides the housing into a planar shape and completely encloses the filter medium. On top and bottom shell thus mirror-like separation surfaces are available. In the assembled state, the sealing contours of the frame correspond to the parting surfaces and are sealed by them. The sealing contours of the frame can thus be arranged in the parting plane. In order to stabilize this connection, the housing walls can be reinforced or widened at the separating surfaces. The separating surfaces can be stretched for example by screws or clip connections against each other and thereby produce a clamping force with the sealing contours of the element. The sealing contour may be sandwiched over the entire area of the parting surface, or integrated in a stepped sealing profile formed by the parting surfaces.
Die Trennebene liegt am größten Umfangsbereich des Gehäuses, wodurch sich die beiden Gehäuseschalen in vorteilhafter Weise hinterschnittsfrei herstellen lassen. Dadurch sind alle Komponenten einfach und wirtschaftlich herstellbar, zusätzlich ergibt sich eine zuverlässige und prozesssichere Montage.The parting line is located at the largest peripheral portion of the housing, which can be produced undercut the two housing shells in an advantageous manner. Thereby All components are simple and economical to produce, in addition, results in a reliable and reliable installation.
Die Verbindung der Dichtkontur des Rahmens wird in einer Ausgestaltung als unlösbare Verbindung ausgeführt. Die Dichtkonturen des Rahmens können mit den Trennflächen der Schalen beispielsweise verklebt oder verschweißt werden. Diese Verbindungsarten erlauben es auf zusätzliche Befestigungsteile und den dafür erforderlichen Raumbedarf zu verzichten. Unter Berücksichtigung der Schwingungs- und Temperaturbelastung der Verbindung stellt diese Ausgestaltung eine sehr kostengünstige und zuverlässige Verbindung dar.The connection of the sealing contour of the frame is carried out in one embodiment as a permanent connection. The sealing contours of the frame can be glued or welded to the parting surfaces of the shells, for example. These types of connections allow to dispense with additional hardware and the space required for it. Taking into account the vibration and temperature stress of the connection, this embodiment represents a very cost-effective and reliable connection.
In einer besonderen Ausführungsform der Erfindung ist zwischen der Rohseite und der Reinseite ein Umgehungsventil vorgesehen. Ventile dieser Art bestehen in der Regel aus Ventilkörper, Ventilsitz, Feder und einem Korb. Das vorzugsweise federbelastete Ventil, öffnet einen Strömungsquerschnitt zwischen Rohseite und Reinseite ab einer definierter Druckdifferenz von beispielsweise 0,4bar. Diese Situation kann dann eintreten, wenn das zu filternde Öl aufgrund tiefer Temperaturen noch sehr zähflüssig ist oder wenn das Filtermedium durch angeströmte Partikel einen erhöhten Strömungswiderstand aufweist. Der Einbauraum des Umgehungsventils lässt sich vorzugsweise in der Trennebene anordnen. Die Trennebene wird dazu über einen Bereich des Filtermediums hinaus verlängert, wodurch sich ein Ventilraum bildet. Im Ventilraum ist die Roh- von der Reinseite durch den Rahmen getrennt, wobei das Umgehungsventil eine kommunizierende Verbindung in Strömungsrichtung gewährleistet. Das Umgehungsventil kann dabei als separate Einheit in den Rahmen eingesetzt werden. Es ist jedoch auch möglich einen Ventilsitz in den Rahmen zu integrieren und die weiteren Ventilteile vor der Montage hinzuzufügen.In a particular embodiment of the invention, a bypass valve is provided between the raw side and the clean side. Valves of this type usually consist of valve body, valve seat, spring and a basket. The preferably spring-loaded valve opens a flow cross section between the raw side and the clean side from a defined pressure difference of, for example, 0.4 bar. This situation can occur if the oil to be filtered is still very viscous due to low temperatures or if the filter medium has an increased flow resistance due to particles being flowed through. The installation space of the bypass valve can preferably be arranged in the parting plane. The parting plane is extended beyond an area of the filter medium, forming a valve space. In the valve chamber, the crude from the clean side is separated by the frame, the bypass valve ensures a communicating connection in the flow direction. The bypass valve can be used as a separate unit in the frame. However, it is also possible to integrate a valve seat in the frame and add the other valve parts prior to assembly.
Das Umgehungsventil sichert die Ölversorgung in vorteilhafter Weise auch bei erhöhten Strömungswiderständen des Filterelementes. Durch die Anordnung in die Trennebene ist das Umgehungsventil bei minimalem Raumbedarf einfach und wirtschaftlich in die Ölfiltereinheit integrierbar.The bypass valve secures the oil supply advantageously even with increased flow resistance of the filter element. Due to the arrangement in the parting plane, the bypass valve can be easily and economically integrated into the oil filter unit with minimal space requirements.
Eine weitere vorteilhafte Ausführungsform ist mit einer Rücklaufsperre ausgestattet. Diese verhindert dass die Ölfiltereinheit beim Betriebsstillstand leer läuft und sichert beim Neustart des Getriebes eine sofortige Ölversorgung. Rücklaufsperren dieser Art werden vorzugsweise aus einer dünnwandigen Metall- Kunstoff- oder Elastomerplatte gebildet, welche einen Ventilsitz in eine Strömungsrichtung radial oder axial verschließen. Um möglichst die gesamte Ölmenge in der Ölfiltereinheit zurückzuhalten kann die Rücklaufsperre direkt am Öleinlass angeordnet werden.A further advantageous embodiment is equipped with a backstop. This prevents the oil filter unit from running idle during operation and ensures an immediate oil supply when the gearbox is restarted. Backstops of this type are preferably formed from a thin-walled metal plastic or elastomer plate, which radially or axially close a valve seat in a flow direction. In order to retain as much oil as possible in the oil filter unit, the backstop can be placed directly on the oil inlet.
Die Rücklaufsperre stellt vorteilhaft auch nach einem Betriebsstillstand eine schnelle Ölversorgung der Ölfiltereinheit sicher und kann bei geringem Raumbedarf in die Unterschale, Oberschale oder in den Rahmen integriert werden.The backstop is advantageous even after a shutdown a fast oil supply to the oil filter unit safe and can be integrated in a small footprint in the lower shell, upper shell or in the frame.
Es ist weiter vorteilhaft direkt am Öleinlass einen Vorfilter anzuordnen der grobe Verunreinigungen von der Ölfiltereinheit zurückhält. Dieser wird vorzugsweise aus einem einlagigem Siebgeflecht gebildet welches eine Maschenweite von ca. 0,4mm bis 0,8mm aufweist. Um mit einem einzigen Vorfilter sowohl Öleinlass als auch ein bereits erwähntes Umgehungsventil vor groben Partikeln zu schützen, kann der Öleinlass direkt neben den Ventilraum des Umgehungsventils positioniert werden. Der Vorfilter kann auch nur zum Schutz des Umgehungsventils an diesem angeordnet sein und dadurch ein völlig ungefiltertes Einströmen von Partikeln in den Ölkreislauf beim Öffnen des Umgehungsventiles verhindern. Zur Befestigung kann der Vorfilter beispeilsweies geklebt, geklipst, geschraubt, geschweißt oder als Einlegeteil angespritzt oder mit eingespritzt werden.It is also advantageous to arrange a prefilter directly at the oil inlet which retains coarse contaminants from the oil filter unit. This is preferably formed from a single-layer mesh which has a mesh size of about 0.4 mm to 0.8 mm. To use a single pre-filter both oil inlet and a previously mentioned To protect the bypass valve from coarse particles, the oil inlet can be positioned directly next to the valve space of the bypass valve. The pre-filter can also be arranged to protect the bypass valve on this and thereby prevent a completely unfiltered influx of particles into the oil circuit when opening the bypass valve. For attachment, the prefilter can be glued, clipped, screwed, welded or injected as an insert or be injected with it.
Gemäß einer weiteren vorteilhaften Ausgestaltung der Erfindung erstreckt sich der Rahmen über eine vorgegebene Distanz zwischen der Ober- und der Unterschale der Ölfiltereinheit und bildet somit einen Teil der Gehäusewandung des Filtergehäuses. Der Rahmen kann die Höhe des Filtermediums auch überragen. Dadurch entsteht an den, den Schalen zugewandten Seiten des Rahmens ein flexibler Freiraum, der zur Anordnung von Befestigungskonturen genutzt werden kann. Diese Konturen können zur Befestigung der Ölfiltereinheit in einer Einbaustruktur oder zur Befestigung der Ober- bzw. der Unterschale am Rahmen genutzt werden. So ist es beispielsweise möglich, Konturen für eine Vibrationsschweißung oder eine Spiegelschweißung am Rahmen anzuordnen. Der zur Vibrationsschweißung erforderliche Freiraum kann ebenfalls berücksichtigt werden. Durch die Höhe des Rahmens können auch weitere Funktionsteile wie das Umgehungsventil, eine Rücklaufsperre, oder ein Vorfilter in den Rahmen integriert werden oder einstückig mit dem Rahmen hergestellt sein. Der Rahmen kann den Anforderungen entsprechend auch als 2 Komponenten Bauteil mit unterschiedlichen Materialien hergestellt sein.According to a further advantageous embodiment of the invention, the frame extends over a predetermined distance between the upper and the lower shell of the oil filter unit and thus forms part of the housing wall of the filter housing. The frame may also protrude above the height of the filter medium. This results in the, the shells facing sides of the frame a flexible space that can be used to arrange fastening contours. These contours can be used to mount the oil filter unit in a mounting structure or to attach the upper and the lower shell to the frame. For example, it is possible to arrange contours for a vibration welding or a mirror weld on the frame. The space required for vibration welding can also be taken into account. By the height of the frame also other functional parts such as the bypass valve, a backstop, or a pre-filter can be integrated into the frame or made in one piece with the frame. The frame can be made according to requirements as a 2-component component with different materials.
Vorteilhaft erlaubt es dieser Rahmen wesentliche Funktionselemente zu integrieren und die Verbindung zwischen den Schalen zuverlässig und wirtschaftlich herzustellen.Advantageously, this frame allows to integrate essential functional elements and to produce the connection between the shells reliably and economically.
Gemäß einer weiteren vorteilhaften Gestaltung sind am Filtergehäuse Konturen zur Befestigung der Ölfiltereinheit in einem Einbauraum eines Getriebes vorgesehen. Diese Konturen können dabei als flache Stege, ösenförmige Ausbuchtungen, Stifte oder clipsähnliche Haken, sowie andere aus dem Stand der Technik bekannte Befestigungsformen aufweisen. Die Befestigungskonturen können an der Unterschale, an der Oberschale oder an der Trennebene angeordnet sein. Da die Wandungsdicke im Bereich der Trennebene sinnvollerweise verstärkt ausgeführt ist und auch noch durch die Dichtkontur des Filterelementes verstärkt sein kann, eignet sich dieser Bereich besonders für die Anordnung von Befestigungskonturen. Diese korrespondieren vorzugsweise mit Befestigungselementen des Getriebegehäuses und sichern die Position der Ölfiltereinheit.According to a further advantageous embodiment, contours for fastening the oil filter unit in an installation space of a transmission are provided on the filter housing. These contours may have as flat webs, eye-shaped bulges, pins or clip-like hooks, as well as other known from the prior art attachment forms. The fastening contours can be arranged on the lower shell, on the upper shell or on the parting plane. Since the wall thickness is expediently reinforced in the region of the parting plane and can also be reinforced by the sealing contour of the filter element, this area is particularly suitable for the arrangement of fastening contours. These preferably correspond with fastening elements of the transmission housing and secure the position of the oil filter unit.
Besonders vorteilhaft ist dabei, dass die Befestigung der Ölfiltereinheit optimal mit dem Einbauraum und dem Einbauvorgang abgestimmt werden kann, wodurch sich eine besonders günstige und wirtschaftliche Befestigung und Montage ermöglicht.It is particularly advantageous that the attachment of the oil filter unit can be optimally tuned with the installation space and the installation process, which allows a particularly favorable and economical attachment and assembly.
In einer weiterführenden Ausführungsform sind am Ölauslass Konturen zur Verbindung mit einem Ansaugflansch einer Ölpumpe angeordnet. Das gefilterte Öl strömt vorzugsweise über einen Ölabströmstutzen, welcher an der Oberschale angeordnet ist weiter zu einer Ölpumpe. Zur Verbindung mit einem Flansch der Ölpumpe sind am Ölabströmstutzen Konturen angebracht. Diese können z.B. als Ringbund, Ringnut, als eine Rastkontur oder als eine beliebige aus dem Stand der Technik bekannte Befestigungskontur für Rohrstutzen ausgeführt sein.In a further embodiment, contours are arranged on the oil outlet for connection to a suction flange of an oil pump. The filtered oil preferably flows via a Ölabströmstutzen, which is arranged on the upper shell further to an oil pump. For connection to a flange of the oil pump contours are attached to the oil outlet. These may e.g. be executed as an annular collar, annular groove, as a latching contour or as any known from the prior art fastening contour for pipe socket.
Dadurch entsteht der Vorteil dass die gesamte Ölfiltereinheit an die Einbausituation angepasst werden kann und der Aufwand für die Verbindung mit der Ölpumpe minimiert wird.This results in the advantage that the entire oil filter unit can be adapted to the installation situation and the effort for connection to the oil pump is minimized.
Diese und weitere Merkmale von bevorzugten Weiterbildungen der Erfindung gehen außer aus den Ansprüchen auch aus der Beschreibung und der Zeichnung hervor, wobei die einzelnen Merkmale jeweils für sich allein oder zu mehreren in Form von Unterkombinationen bei der Ausführungsform der Erfindung und auf anderen Gebieten verwirklicht sein und vorteilhafte sowie für sich schutzfähige Ausführungen darstellen können, für die hier Schutz beansprucht wird.These and other features of preferred embodiments of the invention will become apparent from the claims and from the description and the drawings, wherein the individual features are realized individually or in each case in the form of sub-combinations in the embodiment of the invention and in other fields and can represent advantageous and protectable versions for which protection is claimed here.
Weitere Einzelheiten der Erfindung werden in der Zeichnung anhand von schematischen Ausführungsbeispielen beschrieben. Hierbei zeigen
- Figur 1a bis 1c
- Eine Ölfiltereinheit Explosionsdarstellung,
- Figur 2
- eine zusammengebaute Ölfiltereinheit im Vollschnitt,
- Figur 2a und 2b
- vergrößerte Detailausschnitte gemäß der Bereiche x und Y der Fi- gur 2,
- Figur 3a bis 3c
- eine weitere Variante der Ölfiltereinheit in Explosionsdarstellung,
- Figur 4a und 4b
- eine alternative Ausgestaltung der Ölfiltereinheit in perspektivischer Darstellung.
- FIGS. 1a to 1c
- An oil filter unit exploded view,
- FIG. 2
- an assembled oil filter unit in full section,
- FIGS. 2a and 2b
- enlarged detail sections according to the ranges x and Y of the fi- gur 2,
- FIGS. 3a to 3c
- another variant of the oil filter unit in exploded view,
- FIGS. 4a and 4b
- an alternative embodiment of the oil filter unit in a perspective view.
Die
Die Oberschale 11 bildet eine Gehäusehälfte des zweiteiligen Gehäuses und weist an der oberen Seite einen rohrförmigen Ölabströmstutzen 14 auf, an welchem, auf seiner abströmseitigen Stirnseite, eine Radialnut 15 zur Aufnahme eines O-Ringes 16 angeordnet ist. In Längsrichtung der Oberschale 11 sind auf der unteren, dem Filterelement 13 zugewandten Seite, Rippen 17 angeformt, welche die Oberschale 11 versteifen und in einem zusammengebautem, in der
Das Filterelement 13 besteht aus einem flachförmigen Filtermedium 23, das an seinen Seitenflächen von einem Rahmen 24 umschlossen ist. Das Filtermedium 23 ist zick-zack-förmig gefaltet, wobei die Stirnkanten der Falten vollständig vom Rahmen 24 überdeckt sind. Die Längsseiten der Falten sind ebenfalls dichtend mit dem Rahmen 24 befestigt, wodurch das Filtermedium 23 über den gesamten Umfang im Rahmen 24 dichtend eingefasst ist. Der Rahmen 24 weist über seinen gesamten Umfang eine stegförmige Dichtkontur 25 auf.The
Die Unterschale 12 weist eine, zur Trennfäche 18 der Oberschale hin, spiegelbildliche Trennfläche 18b auf. Die Unterschale 12 bildet einen Rohraum 28, der durch eine querstehende Trennwand 26 von einem Ventilraum 27 getrennt ist. Korrespondierend mit dem Ventilraum 27 ist ein zylindrischer Ventilflansch 33 angeordnet der zur Aufnahme des Umgehungsventiles 30 vorgesehen ist. Der an der Unterseite angeformte Öleinlass 29 bildet eine ovale Kontur die im Bereich der Trennwand 26 angeordnet ist und dadurch mit dem Rohraum 28 und dem Ventilraum 27 korrespondiert. Das unterhalb des Öleinlasses 29 gezeigte Vorfilter 31 korrespondiert durch seine Umfangskontur mit dem Öleinlass 29 und hält in eingebautem Zustand Grobpartikel zurück. Seitlich an der Oberschale 11 angeordnete Befestigungskonturen 22 dienen zur Befestigung des Ölfilterelementes 10 in einem Einbauraum.The
Das durch den Öleinlaß 29 angesaugte Öl wird durch das, in der Unterschale 12 angebrachte Vorfilter 31 von groben Partikeln gereinigt. Das Öl strömt durch das Filtermedium 23 wodurch sich dieses in Strömungsrichtung wölbt und von den Rippen 17 abgestützt wird. Im weiteren Verlauf strömt das Öl durch den Ölabströmstutzen 14 zu einer nicht dargestellten Ölpumpe. Ist das Filtermedium 23 stark verschmutzt oder das Öl aufgrund niedriger Temperaturen zu dickflüssig, so öffnet sich infolge des erhöhten Differenzdrukkes das Umgehungsventil 30 wodurch die Ölversorgung gesichert bleibt.The oil sucked through the
In den
Die
Claims (9)
- Oil filter unit (10) disposed in the oil sump of an oil circuit for an automatic transmission of an internal combustion engine, featuring a filter housing in which a filter chamber is disposed, the filter housing featuring correspondingly to the filter chamber an oil inlet (29) and an oil outlet (14), a filter element being sealingly attached in the housing between the oil inlet and the oil outlet, the filter housing being made at least of two parts and the filter element (13) featuring a pleated filter medium which is sealingly enclosed by a frame (24), the frame featuring sealing contours (25) which are designed correspondingly in relation to the contours of the filter housing, the filter medium being a glass fiber medium and featuring a filter porosity with a pore size of less than 25 µm and the filter medium being reinforced at one on-flow side and / or one off-flow side by a supporting grid.
- Oil filter unit according to claim 1, characterized in that the housing is made of two shells (11, 12), a parting plane (18a, 18b) which corresponds with the sealing contours (25) of the filter element (13) existing between the shells (11, 12)
- Oil filter unit according to claim 2, characterized in that the shells (11, 12) are connected non-detachably with the sealing contour of the frame at the parting plane (18a, 18b).
- Oil filter unit according to one of the above claims, characterized in that a bypass valve (30) is disposed between the oil inlet (29) and the oil outlet (14) for bypassing the filter element (13).
- Oil filter unit according to one of the above claims, characterized in that a return stop (234) is disposed in the area of the oil inlet (29).
- Oil filter unit according to one of the above claims, characterized in that a prefilter (31) is disposed at the oil inlet (29).
- Oil filter unit according to one of the above claims, characterized in that the frame (24) extends over the height of the filter element (13) and forms one part of the filter housing.
- Oil filter element according to one of the above claims, characterized in that fixing contours are provided at the filter housing or at the frame for fixing the filter housing in an installation space.
- Oil filter element according to one of the above claims, characterized in that contours for connecting with an intake flange of an oil pump are disposed at the oil outlet (14).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005004287A DE102005004287B4 (en) | 2005-01-28 | 2005-01-28 | Oil filter unit |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1685889A1 EP1685889A1 (en) | 2006-08-02 |
EP1685889B1 true EP1685889B1 (en) | 2011-06-08 |
Family
ID=35976422
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05109531A Active EP1685889B1 (en) | 2005-01-28 | 2005-10-13 | Oil sump filter |
Country Status (5)
Country | Link |
---|---|
US (1) | US7845500B2 (en) |
EP (1) | EP1685889B1 (en) |
JP (1) | JP4849396B2 (en) |
AT (1) | ATE511902T1 (en) |
DE (1) | DE102005004287B4 (en) |
Cited By (1)
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DE102013113155A1 (en) * | 2013-11-28 | 2015-05-28 | Emitec France S.A.S | Liquid cleaning element for cleaning a liquid |
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2005
- 2005-01-28 DE DE102005004287A patent/DE102005004287B4/en active Active
- 2005-10-13 EP EP05109531A patent/EP1685889B1/en active Active
- 2005-10-13 AT AT05109531T patent/ATE511902T1/en active
-
2006
- 2006-01-10 JP JP2006002586A patent/JP4849396B2/en active Active
- 2006-01-27 US US11/340,509 patent/US7845500B2/en active Active
Cited By (1)
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DE102013113155A1 (en) * | 2013-11-28 | 2015-05-28 | Emitec France S.A.S | Liquid cleaning element for cleaning a liquid |
Also Published As
Publication number | Publication date |
---|---|
ATE511902T1 (en) | 2011-06-15 |
EP1685889A1 (en) | 2006-08-02 |
JP4849396B2 (en) | 2012-01-11 |
JP2006205161A (en) | 2006-08-10 |
DE102005004287A1 (en) | 2006-08-03 |
DE102005004287B4 (en) | 2013-06-13 |
US20060180541A1 (en) | 2006-08-17 |
US7845500B2 (en) | 2010-12-07 |
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